The BMW 7 Series Long (G12) 730Ld Steptronic, produced from 2015 to 2019, represents a significant iteration of BMW’s flagship luxury sedan. This variant, specifically tailored for markets desiring a longer wheelbase for enhanced rear passenger comfort, was primarily sold in Europe and Asia. The “L” designation denotes the long-wheelbox version, adding approximately 140mm (5.5 inches) to the standard 7 Series wheelbase. Positioned as a mid-range offering within the G12 lineup, the 730Ld balanced fuel efficiency with respectable performance, appealing to buyers seeking a luxurious experience without the outright power of the higher-tier models like the 750i or M760i. It served as a key competitor to the Mercedes-Benz S-Class Long and Audi A8L.
Technical Specifications
| Brand | BMW |
| Model | 7 Series |
| Generation | 7 Series Long (G12) |
| Type (Engine) | 730Ld (265 Hp) Steptronic |
| Start of production | 2015 |
| End of production | 2019 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban | 5.5-5.9 l/100 km (42.8 – 39.9 US mpg, 51.4 – 47.9 UK mpg, 18.2 – 16.9 km/l) |
| Fuel consumption (economy) – extra urban | 4.1-4.4 l/100 km (57.4 – 53.5 US mpg, 68.9 – 64.2 UK mpg, 24.4 – 22.7 km/l) |
| Fuel consumption (economy) – combined | 4.6-5.0 l/100 km (51.1 – 47 US mpg, 61.4 – 56.5 UK mpg, 21.7 – 20 km/l) |
| CO2 emissions | 122-132 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.2 sec |
| Acceleration 0 – 62 mph | 6.2 sec |
| Acceleration 0 – 60 mph | 5.9 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 6.8 kg/Hp, 147.6 Hp/tonne |
| Weight-to-torque ratio | 2.9 kg/Nm, 345.4 Nm/tonne |
| Power | 265 Hp @ 4000 rpm |
| Power per litre | 88.5 Hp/l |
| Torque | 620 Nm @ 2000-2500 rpm (457.29 lb.-ft. @ 2000-2500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | B57D30A |
| Engine displacement | 2993 cm3 (182.64 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 90 mm (3.54 in.) |
| Compression ratio | 16.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 11.9 l (12.57 US qt | 10.47 UK qt) |
| Kerb Weight | 1795 kg (3957.3 lbs.) |
| Max. weight | 2490 kg (5489.51 lbs.) |
| Max load | 695 kg (1532.21 lbs.) |
| Trunk (boot) space – minimum | 515 l (18.19 cu. ft.) |
| Fuel tank capacity | 78 l (20.61 US gal | 17.16 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 2100 kg (4629.71 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 100 kg (220.46 lbs.) |
| Length | 5238 mm (206.22 in.) |
| Width | 1902 mm (74.88 in.) |
| Height | 1485 mm (58.46 in.) |
| Wheelbase | 3210 mm (126.38 in.) |
| Front track | 1618 mm (63.7 in.) |
| Rear (Back) track | 1646 mm (64.8 in.) |
| Front overhang | 880 mm (34.65 in.) |
| Rear overhang | 1148 mm (45.2 in.) |
| Ride height (ground clearance) | 135 mm (5.31 in.) |
| Drag coefficient (Cd) | 0.24 |
| Minimum turning circle (turning diameter) | 12.8 m (41.99 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 8 gears, automatic transmission Steptronic |
| Front suspension | Double wishbone |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 225/60 R17 99Y; 245/50 R18; 245/45 R19; 275/40 R19; 245/40 R20; 275/35 R20; 245/35 R21; 275/30 R21 |
| Wheel rims size | 7.5J x 17; 8J x 18; 8.5J x 19; 9.5J x 19; 8.5J x 20; 10J x 20; 8.5J x 21; 10J x 21 |
Powertrain & Engine Architecture
The 730Ld is powered by BMW’s B57D30A 3.0-liter inline-six diesel engine. This engine is a member of the modular BMW engine family, known for its robust construction and efficiency. The B57 features a common-rail direct injection system operating at extremely high pressures (2,200 bar) for optimized combustion. A twin-scroll turbocharger with variable geometry turbine (VGT) technology, along with intercooling, delivers strong torque across a broad rev range. The engine also incorporates BMW’s BluePower technology, including a diesel particulate filter and NOx catalyst to meet stringent Euro 6 emissions standards. The engine is mated to BMW’s 8-speed Steptronic automatic transmission, renowned for its smooth shifts and efficiency. This transmission features adaptive shift programs that adjust to the driver’s style and road conditions.
Driving Characteristics
The 730Ld offers a refined and comfortable driving experience. While not as overtly sporty as some of its gasoline-powered siblings, the 620 Nm (457 lb-ft) of torque provides ample power for effortless cruising and confident overtaking. The 8-speed automatic transmission is well-tuned, providing smooth and quick gear changes. The long wheelbase contributes to a stable and composed ride, particularly on highway journeys. Compared to the 740i with its inline-six gasoline engine, the 730Ld prioritizes fuel economy and low-end torque over outright acceleration. The 0-60 mph time of around 5.9 seconds is respectable, but the 730Ld’s strength lies in its relaxed and efficient power delivery.
Equipment & Trim Levels
The 730Ld typically came well-equipped, reflecting its position as a luxury vehicle. Standard features included leather upholstery, power-adjustable front seats with memory function, a premium sound system, a navigation system, and a comprehensive suite of safety features like lane departure warning, collision avoidance, and automatic emergency braking. Optional extras included rear-seat entertainment systems, massaging seats, a panoramic sunroof, and various interior trim options. The long wheelbase specifically added increased rear legroom and often included features like reclining rear seats and individual climate control for rear passengers.
Chassis & Braking
The G12 7 Series utilizes a lightweight chassis construction incorporating high-strength steel and aluminum. The front suspension features a double-wishbone design, while the rear employs an independent multi-link setup. This configuration provides a comfortable ride and precise handling. The 730Ld typically came equipped with ventilated disc brakes on all four wheels, providing ample stopping power. ABS, Dynamic Stability Control (DSC), and other electronic stability systems are standard. The suspension settings were tuned to prioritize comfort, with adaptive dampers available as an option to further refine the ride quality.
Market Reception & Comparison
The 730Ld was generally well-received by automotive critics, who praised its fuel efficiency, comfortable ride, and luxurious interior. It was often seen as a sensible choice for buyers who prioritized practicality and running costs over outright performance. Compared to the 740i, the 730Ld offered significantly better fuel economy, making it a more attractive option for high-mileage drivers. However, the 740i provided a more engaging driving experience and quicker acceleration. Against its rivals, the Mercedes-Benz S 350 d and Audi A8 3.0 TDI, the 730Ld held its own in terms of refinement, technology, and overall value.
Legacy
The B57 engine family, including the B57D30A found in the 730Ld, has proven to be remarkably reliable. These engines are known for their durability and relatively low maintenance costs. On the used car market, the 730Ld represents a good value proposition, offering a luxurious and well-equipped sedan at a more affordable price point than its higher-powered counterparts. However, potential buyers should be aware of the potential costs associated with maintaining a complex luxury vehicle, including the cost of replacing wear items and addressing any potential issues with the electronic systems. The G12 7 Series, and the 730Ld in particular, remains a desirable choice for those seeking a comfortable, refined, and efficient luxury sedan.
